Toughness of Different VPS Impression Materials

Oct 4th, 2006
The clinical success of a precision impression material strongly depends on good mechanical properties of the elastomer during removal of the set impression from a patient�s mouth. A high tear resistance of the set impression material is advantageous to withstand tearing in thin interproximal areas and in the depth of the gingival sulcus and can be described by the force and the elongation which occur when the material is torn apart. This study compared the maximum force, the maximum elongation and the integral under the stress strain-curve of different VPS Wash impression materials in a tear experiment.
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